The general's household has been loyal for generations, yet treacherous ministers frame them, and every man in the family is sentenced to death. Gu Zhao, once a frail scholar who couldn't harm a chicken, becomes the only surviving man of the Gu family. Forced to take his three young sisters-in-law and little niece along, he embarks on a death march three thousand li north into exile.
At the edge of despair, Gu Zhao unexpectedly unlocks a mysterious emergency medical space from the modern world. When his niece is critically ill with a high fever, he turns fever medicine into a "miracle cure" and brings her back from the brink of death. When his family is starving and freezing, he uses soup concentrate to cook a feast that wins over the vicious guards. And when hired killers sent by the powerful come to silence them, he turns chili powder and a powerful flashlight into "immortal arts" to survive against all odds!
An assassination reveals the shocking plot behind the family's destruction, with the Marquis of Dingyuan, a powerful figure at court, at its center. Even more astonishing, his third brother, long believed to have died in battle, is living in hiding among the common folk as a miracle doctor. The brothers reunite, and the flames of revenge roar to life.
Armed with modern knowledge and wielding chemical formulas like military strategy, Gu Zhao starts from nothing in this treacherous ancient world. He makes a wondrous product called "soap" to build his fortune and win people's hearts. But just as his enterprise begins to flourish, his enemies' elite assassins lay a vast, inescapable trap. This time, how will he lead his family to carve out a path to survival from this seemingly certain death?